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Data Acquisition and Signal Pre-Processing:
Analog / Digital Conversion: 12-bit A/D conversion (Minimum … 16-bit if possible) Least-Significant-Bit (LSB) value: 2.5 μV / AD value 10 channels (electrodes) converted to 12 standard ECG leads Primary Sample Rate: 2000 Hz / channel Bridge filter to 500Hz / lead Least-Significant-Bit (LSB) value: 2.5 μV / AD value Dynamic Range: ±10 mV
Digital Filters: FDA / AHA Recommended 0.05 – 125 Hz 50 / 60 Hz AC notch (AC mains) filter … selectable
Other: Noise Detection/Levels Lead Quality (Leads OFF detection) Pacemaker detection.
Signal-Processing and Features:
Real-Time Heart-Rate: Updated every 6 - 8 seconds Range: 15 – 300 bpm
Real-Time Arrhythmia Detection: PVCs, Couplets, Triplets, Atrial Fib or Flutter, Ventricular Tachycardia, Bradycardia, Rate-dependent Bundle-Brach-Blocks, Pacemaker Detection, Asystole and Other Rhythm disturbances.
Additional Digital Filters: All selectable - DISPLAY ONLY - Analyzed data is Unfiltered (Non-diagnostic) and is in separate data-stream 0.5 Hz Baseline Highpass 40 Hz Lowpass FIR ( … for muscle artifacts ) Cubic-Spline (Baseline wander … optional)
Other: Additional Noise Detection/Levels Lead Quality Processing (Leads OFF detection) Accommodate Pacemaker (if present)
Performance :
Heart-Rates : 15 – 300 bpm Dynamic Range : ±10 mV ST-Levels tested : ±5 mV ST-Slopes tested : ±5 mV/sec QRS-durations : 54 – 360 msec Maximum PR-int : 350 msec Maximum QT-int : 650 msec
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Display:
Standard 12-Leads: I, II, III, aVR, aVL, aVF, V1, V2, V3, V4, V5, V6.
Display Formats : 6 X 2 Leads ( Sequential lead rotation ) 3 X 4 Leads 3 X 4 + 1 Rhythm Lead ( user selectable Rhythm Lead ) 3 X 4 + 3 Rhythm Leads ( user selectable Rhythm Leads ) 3 Rhythm Leads ( user selectable Rhythm Leads ) Exercise: Baseline and Current Averaged beats with ST-measures
Speeds ( mm / sec ) : 5, 6.25, 10, 12.5, 25, 50, 100
Gains (μV/ mm ) : 400, 200, 100, 50, 25 ( mm / mV ) : 2.5, 5, 10, 20, 40
Grid Sizes : 5 mm X 5 mm + 1 mm dots ( Fixed … Standard ) Smart-Grid : Proportional Speed and Gain Tracking
Grid Colors : Light RED ( Standard ) Light GREEN AMBER / ORANGE Light BLUE -OFF- ( No GRID - WHITE background only )
Digital Display Frequency : 500 Hz - at all combinations of Speed and Gain
Display Filters : - NONE - ( 0.05 – 125 Hz with 60 Hz AC notch … diagnostic ) 0.5 Hz Baseline Highpass 40 Hz Lowpass FIR ( for muscle artifacts )
Digital Step Reduction : High-velocity anti-aliasing ( “blurs” QRS to reduce visual steps )
ECG Waveform Display Accuracy : < 1% error at all Speed/Gain combinations for all frequencies in diagnostic range ( 0.05 – 125 Hz ) ( Note : User-selected display filters will affect amplitude and frequency content of displayed ECG waveforms to varying degrees )
Main ECG Display Status Line : Patient Last Name, First Name Heart-Rate Current Speed / Gain Current Filters Selected Lead Noise and Lead Fault Status
Status Indicators ( messages ) : Speed/Gain Changes Automatic Lead Faults ( each lead ) Excessive Noise ( each lead )
Red-Line Redux ( each lead ) : Lead Fault - Thick, Flat RED-Line Moderate Lead Noise - Thin RED-Line ECG waveform Excessive Lead Noise - Thick RED-Line ECG waveform -OKAY- Normal ECG waveform |